773
FXUS65 KBYZ 271949
AFDBYZ
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BILLINGS MT
149 PM MDT WED MAY 27 2026
KEY MESSAGES
- HOT CONDITIONS THROUGH THE WEEK. MOUNTAIN SNOWMELT WILL INCREASE
RIVER FLOWS. NO FLOODING IS EXPECTED AT THIS TIME.
- DAILY CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH THE END OF
THE WEEK. BEST CHANCES ARE OVER SOUTH-CENTRAL/WESTERN MONTANA
AND NORTH-CENTRAL/WESTERN WYOMING.
- POTENTIAL INCREASING FOR COOLER AND MORE WIDESPREAD
SHOWER/THUNDERSTORM CHANCES FOR THE UPCOMING WEEKEND.
DISCUSSION
THROUGH TUESDAY...
A PERSISTENT UPPER LEVEL PATTERN WILL PREVAIL THROUGH THE END OF
THE WORK WEEK, WITH UPPER TROUGHING TO OUR SOUTHWEST AND HIGH
PRESSURE TO THE EAST. THE AREA WILL CONTINUE TO BE UNDER THE
INFLUENCE OF SOUTH TO SOUTHEAST FLOW, AND HIGH PRESSURE NOSING
INTO EASTERN MT WILL KEEP HIGHER HEIGHTS IN PLACE. HIGH
TEMPERATURES WILL RANGE FROM THE 80S TO 90S THROUGH FRIDAY,
GENERALLY WARMEST OVER THE EAST. SOUTHEAST TO EAST WINDS WILL BE
BREEZY EAST OF BILLINGS, WHERE DAILY GUSTS BETWEEN 20-40 MPH ARE
POSSIBLE THROUGH THURSDAY, WITH GUSTS CONFINED MORE TO THE DAKOTAS
BORDER ON FRIDAY AS A THERMAL TROUGH SHIFTS EAST.
WHILE ABOVE NORMAL PWATS CONTINUE THROUGH THE END OF THE WEEK,
FORCING (0.75 TO 1 INCH MOST DAYS), GREATEST FORCING WILL BE
MAINLY WEST OF THE AREA. ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS (15-30% CHANCE) ARE POSSIBLE MOST DAYS, GREATEST
OVER THE HIGHER TERRAIN AND WESTERN AREAS. GUSTY AND ERRATIC WINDS
TO 50 MPH ARE THE MAIN THREAT, WITH THE STRONGEST ACTIVITY CAPABLE
OF PRODUCING MODERATE RAINFALL, THOUGH PRECIPITATION WILL BE
LIMITED FOR MOST.
HEADING INTO THE WEEKEND AND EARLY NEXT WEEK, ENSEMBLES HAVE
CONTINUED IN PROGGING AN AREA OF LOW PRESSURE LIFTING THROUGH THE
GREAT BASIN AND INTO THE REGION. SOME SOLUTIONS SHOW A FILLING
LOW, WHILE OTHERS WRAP IT UP OVER THE REGION. ANOTHER WAVE COULD
MOVE IN BEHIND THE SYSTEM INTO EARLY NEXT WEEK, THOUGH IT REMAINS
MORE UNCERTAIN. DESPITE THE UNCERTAINTY, THERE IS INCREASING
CONFIDENCE IN COOLER CONDITIONS AND INCREASING SHOWER AND THUNDERSTORM
CHANCES (50-90% CHANCE). CURRENTLY, THE PROBABILITY FROM SATURDAY
THROUGH MONDAY FOR 0.5 INCHES OF PRECIPITATION RANGES FROM
(40-80%, GREATEST OVER WESTERN AND CENTRAL AREAS). WITH THE MORE
ACTIVE WEATHER, TEMPERATURES ARE FORECAST TO DROP INTO THE UPPER
60S TO 80S SATURDAY, TO THE 60S TO 70S SUNDAY THROUGH TUESDAY. STP
AVIATION
ISOLATED SHOWERS AND THUNDERSTORMS WILL MOVE THROUGH WESTERN AND
CENTRAL PORTIONS OF THE REGION (KLVM, KBIL, AND KSHR) THIS
AFTERNOON, QUICKLY DISSIPATING THIS EVENING. THE MAIN THREAT WITH
ANY STORMS IS ERRATIC WIND GUSTS UP TO 40 KTS. FROM KSHR EAST,
SOUTHEAST WIND GUSTS OF 25 TO 35 KTS CONTINUE THIS AFTERNOON.
THESE GUSTS WILL BRIEFLY DECREASE OVERNIGHT BEFORE INCREASING
AGAIN THURSDAY MORNING AS A LOW LEVEL JET SETS UP AGAIN. ARCHER
PRELIMINARY POINT TEMP/POPS
THU FRI SAT SUN MON TUE WED
-----------------------------------------------------------
BIL 060/091 060/093 060/079 052/069 047/071 048/074 048/077
22/T 20/B 28/T 76/T 44/T 32/T 22/T
LVM 049/087 048/084 048/067 043/063 040/067 041/071 043/076
22/T 22/T 59/T 86/T 55/T 43/T 22/T
HDN 056/092 055/095 054/082 049/071 045/073 045/075 046/078
22/T 20/B 27/T 76/T 43/T 32/T 22/W
MLS 066/092 065/094 061/087 054/074 047/073 048/075 048/078
02/T 21/B 26/T 65/T 32/T 42/W 32/W
4BQ 063/088 062/093 059/084 052/073 047/073 047/074 048/077
02/T 21/B 26/T 54/T 44/T 43/T 32/T
BHK 058/089 060/089 058/085 051/077 045/073 045/075 045/077
00/N 00/N 27/T 54/T 33/T 33/W 32/T
SHR 052/085 052/087 050/079 043/069 040/071 040/073 041/076
22/T 21/B 27/T 68/T 45/T 45/T 33/T
BYZ WATCHES/WARNINGS/ADVISORIES
MT...NONE.
WY...NONE.
WEATHER.GOV/BILLINGS
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page